It depends on the position of potentiometer. Upload the code to arduino and you should see the servo move to a specific position. MyServo.write(val) //set the servo position according to val Int val = analogRead(potPin) // read the pot value,save it in val Int potPin = 0 //Set a variable named potPin as A0 Thus the change in resistance of the potentiometer will help us control the movement of servo precisely. The pot will be used to generate analog values which we will map to the servo. The central terminal of pot is connected to A0 pin, other two pins are connected to 5v and Gnd. Here we have added a 10k ohm potentiometer (variable resistor). In this circuit the servo connections are similar to previous one. But for most projects we need a precise way to control servo angle. This code is best for checking if a servo is working. You will notice the servo sweeps from end to end. MyServo.write(i) //writes the value to turn servo MyServo.attach(9) //connect servo signal to pin 9įor(int i=0 i = 0 i-) //goes form 180 to 0 Servo myServo //set servo variable as myServo Now refer the code bellow: #include //import the servo library For more information of power requirements of your servo check it’s data sheet. The servo is powered directly from arduino but if you are planning to use more than one servo, I suggest using an external power supply. The Vcc is connected to 5v, Gnd is connected to Gnd and Signal pin is connected to pin 9. Simple Servo Control With Arduino:įirst connect the servo to arduino as shown in the figure. To control the Servo we will use this feature of the arduino. When the output is 255 the pin is at 5v constant, for 127 it is 2.5v and so on. As arduino is a 8-bit controller its PWM is 0-255, 0 being lowest and 255 being highest. The duration of on time / High signal is called as Pulse Width and controlling the duration can create different frequencies.Īrduino has 6 PWM pins (3,5,6,9,10 & 11). It is a signal created by high and low pulses with an equal interval of time. In PWM a digital pin is used to generate a square wave. To control servo we need PWM signals, PWM stands for Pulse Width Modulation. Now that we have gathered all the required components, we can move forward to control the servo.
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